```python
mapping = {
    "frostbit 1000 cryonic bitmining units": "unknown",
    "fsp aurum pro 1200w 80+gold": "unknown",
    "fsp aurum pro series 1000w modular psu": "unknown",
    "fsp raider 750 watt 80 plus silver psu": "unknown",
    "ft2232": "unknown",
    "ft2232 based jtag adapter": "unknown",
    "ft232 usb to uart converter": "unknown",
    "ft232h single hs usb-uart/fifo ic": "unknown",
    "ft232r usb uart": "unknown",
    "ft232rl": "unknown",
    "ftdi": "unknown",
    "ftdi 232h chip": "unknown",
    "ftdi chip": "unknown",
    "ftdi driver": "unknown",
    "ftdi drivers": "unknown",
    "ftdi drivers (libftdi1)": "unknown",
    "ftdi ft2232hl": "unknown",
    "ftdi usb serial device converter": "unknown",
    "ftdi232h": "unknown",
    "ftdi_sio": "unknown",
    "fujitsu machines": "unknown",
    "full metal shelving": "unknown",
    "full speed cubes": "unknown",
    "full unit": "unknown",
    "full units": "unknown",
    "fully assembled boards": "unknown",
    "fully assembled miners": "unknown",
    "funded asic": "unknown",
    "furnace-type filter": "unknown",
    "fury ii sticks": "unknown",
    "fury little miners": "unknown",
    "fury miners": "unknown",
    "fury sticks": "unknown",
    "fury's miner": "unknown",
    "fuschia": "unknown",
    "fuse": "unknown",
    "fuse f1": "unknown",
    "fuse holder": "unknown",
    "fuse panel": "unknown",
    "fuses": "unknown",
    "futurebit apollo btc": "unknown", # No exact match, but related to mining hardware.
    "futurebit apollo scrypt miner": "unknown", # No exact match, but related to mining hardware.
    "fw": "unknown",
    "g-blade": "unknown",
    "g.skill ripjaws x series 16gb ddr3 2133": "unknown",
    "g2 evga": "unknown",
    "g4 with 1500 ghz": "unknown",
    "g5 : 2x28ghz quad core intel xeon": "unknown",
    "g620": "unknown",
    "g7": "unknown",
}
```